Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
The onset of September brings an average high-temperature of a comfortable 18.3°C (64.9°F), nearly matching the August temperature. During the month of September, Keyston anticipates a mean low-temperature of 10.5°C (50.9°F).Humidity
In Keyston, the average relative humidity in September is 79%.Rainfall
The month with the least rainfall in Keyston is September, when the rain falls for 10.5 days and typically collects 19mm (0.75") of precipitation.Snowfall
In Keyston, snow does not fall in April through October.Daylight
In September, the average length of the day in Keyston, United Kingdom, is 12h and 40min.On the first day of September, sunrise is at 6:14 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:41 pm BST.
Sunshine
In Keyston, the average sunshine in September is 7h.UV index
In Keyston, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Keyston?
What is the average humidity in September in Keyston?
What is the driest month in Keyston?
How many days does it rain in September in Keyston?
When it does not snow in Keyston?
What is the average length of the day in September in Keyston?
When are sunrise and sunset in September in Keyston?
How many hours of sunshine does Keyston have in September?
What is the UV index reading in September in Keyston?
Average temperature in September
Keyston, United Kingdom
- Average high temperature in September: 18.3°C
The warmest month (with the highest average high temperature) is July (21°C).
The month with the lowest average high temperature is January (6°C).
- Average low temperature in September: 10.5°C
The month with the highest average low temperature is August (13.1°C).
The coldest month (with the lowest average low temperature) is January (1.5°C).
Average pressure in September
Keyston, United Kingdom
- Average pressure in September: 1016.5mbar
The month with the highest atmospheric pressure is May (1016.6mbar).
The month with the lowest atmospheric pressure is November (1010.1mbar).
Average wind speed in September
Keyston, United Kingdom
- Average wind speed in September: 13.4km/h
The windiest month (with the highest average wind speed) is December (18.6km/h).
The calmest month (with the lowest average wind speed) is July (12.8km/h).
Average humidity in September
Keyston, United Kingdom
- Average humidity in September: 79%
The month with the highest relative humidity is December (91%).
The month with the lowest relative humidity is August (77%).
Average rainfall in September
Keyston, United Kingdom
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is June (44mm).
The driest month (with the least rainfall) is September (19mm).
Average rainfall days in September
Keyston, United Kingdom
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is September (10.5 days).
Average snowfall in September
Keyston, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (21mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Keyston, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Keyston, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in September: 7h and 0min
The month with the most sunshine is August (Average sunshine: 7h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
Keyston, United Kingdom
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in September
Keyston, United Kingdom
- Average UV index in September: 4
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Keyston, United Kingdom
- Average cloud cover in September: 50
The month with the most cloud cover is November (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 50).
Average visibility in September
Keyston, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).
The month with the lowest visibility is November (8km).
